<s>
In	O
computer	B-General_Concept
science	I-General_Concept
and	O
data	B-General_Concept
management	I-General_Concept
,	O
a	O
commit	B-Language
is	O
the	O
making	O
of	O
a	O
set	O
of	O
tentative	O
changes	O
permanent	O
,	O
marking	O
the	O
end	O
of	O
a	O
transaction	B-General_Concept
and	O
providing	O
Durability	O
to	O
ACID	B-Operating_System
transactions	I-Operating_System
.	O
</s>
<s>
A	O
commit	B-Language
is	O
an	O
act	O
of	O
committing	O
.	O
</s>
<s>
The	O
record	O
of	O
commits	O
is	O
called	O
the	O
commit	B-Language
log	I-Language
.	O
</s>
<s>
A	O
COMMIT	B-Language
statement	O
in	O
SQL	B-Language
ends	O
a	O
transaction	B-General_Concept
within	O
a	O
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
(	O
RDBMS	O
)	O
and	O
makes	O
all	O
changes	O
visible	O
to	O
other	O
users	O
.	O
</s>
<s>
The	O
general	O
format	O
is	O
to	O
issue	O
a	O
BEGIN	B-General_Concept
WORK	I-General_Concept
(	O
or	O
BEGIN	O
TRANSACTION	B-General_Concept
,	O
depending	O
on	O
the	O
database	O
vendor	O
)	O
statement	O
,	O
one	O
or	O
more	O
SQL	B-Language
statements	O
,	O
and	O
then	O
the	O
COMMIT	B-Language
statement	O
.	O
</s>
<s>
Alternatively	O
,	O
a	O
ROLLBACK	B-Application
statement	O
can	O
be	O
issued	O
,	O
which	O
undoes	O
all	O
the	O
work	O
performed	O
since	O
BEGIN	B-General_Concept
WORK	I-General_Concept
was	O
issued	O
.	O
</s>
<s>
A	O
COMMIT	B-Language
statement	O
will	O
also	O
release	O
any	O
existing	O
savepoints	B-General_Concept
that	O
may	O
be	O
in	O
use	O
.	O
</s>
<s>
In	O
terms	O
of	O
transactions	O
,	O
the	O
opposite	O
of	O
commit	B-Language
is	O
to	O
discard	O
the	O
tentative	O
changes	O
of	O
a	O
transaction	B-General_Concept
,	O
a	O
rollback	B-Application
.	O
</s>
